define([
	'jquery', 
	'underscore', 
	'backbone', 
	'models/tweet'
], function($, _, Backbone, Tweet){
	var Tweets = Backbone.Collection.extend({
		model: Tweet,
		initialize: function(models, options){
			this.bind("add", options.view.addTweet);
		}
	});
	return Tweets;
});